EP1097529A2 - Method for transmitting information and radio station - Google Patents

Method for transmitting information and radio station

Info

Publication number
EP1097529A2
EP1097529A2 EP99945919A EP99945919A EP1097529A2 EP 1097529 A2 EP1097529 A2 EP 1097529A2 EP 99945919 A EP99945919 A EP 99945919A EP 99945919 A EP99945919 A EP 99945919A EP 1097529 A2 EP1097529 A2 EP 1097529A2
Authority
EP
European Patent Office
Prior art keywords
frequency
information
frequency channels
channels
frequency channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99945919A
Other languages
German (de)
French (fr)
Other versions
EP1097529B1 (en
Inventor
Bernhard Raaf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1097529A2 publication Critical patent/EP1097529A2/en
Application granted granted Critical
Publication of EP1097529B1 publication Critical patent/EP1097529B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]

Definitions

  • the invention relates to a method and a radio station for information transmission, in particular by means of a mobile radio system, the frequency channel arrangement used here, and a correspondingly adapted frequency channel search.
  • the frequency bands available m are also divided into several frequency channels according to a frequency multiple access FDMA.
  • Two frequency bands with 45MHz band spacing are reserved for GSM operation: the range 890MHz to 915MHz for upmk from the mobile station to the base station and the range 935MHz to 960MHz for downlmk operation from the base station to the mobile station.
  • the frequency bands have a width of 25MHz and are divided into 124 individual frequency channels with 200 KHz each. Frequently, a frequency band is still divided and the resulting sub-frequency bands and the corresponding frequency channels are allocated to different network operators.
  • Future mobile radio systems such as the ide band CDMA system which is in the standardization, may also be used in connection with another access method, such as a time division access method TDMA, a frequency division multiple access method FDMA together with a code division multiple access method CDMA Commitment.
  • another access method such as a time division access method TDMA, a frequency division multiple access method FDMA together with a code division multiple access method CDMA Commitment.
  • the invention is based on the object to arrange existing frequency ranges for communication via a mobile radio system, to structure and to the individual network operators or Assign participants that they can be used efficiently for information transmission.
  • the invention is therefore based on the idea of dividing available frequency ranges m frequency bands or at least one frequency band and frequency channels, and these
  • the rough grid scheme can also be described, for example, by a carrier spacing and the fine grid scheme as a sub-grid.
  • Another development of the invention provides that the coarse and the fine grid scheme is described by variable and constant information.
  • the coarse and the fine grid scheme is described by variable and constant information.
  • the information is carried out in accordance with a CDMA method, wherein the radio signals spread by means of a CDMA code are transmitted essentially within a frequency channel, and the arrangement of the frequency channels is adapted to the transmission conditions in accordance with the raster pattern in such a way that interference between the radio signals of the frequency channels is reduced as much as possible.
  • the invention also includes methods for transmitting information between a first base station BS and a first mobile station MS and a second base station BS and a second mobile station MS, in which a plurality of frequency channels f are available for transmitting the information, and the transmission of information between the first base station on BS and the first mobile station MS at least temporarily by means of radio signals essentially within a first frequency channel fl, and the transmission of information between the second base station BS and the second mobile station MS takes place at least temporarily by means of radio signals essentially within a second frequency channel f2, the first and second base stations can also be assigned to different network operators or different layers of a hierarchical cell system.
  • transmission also means sending and / or receiving messages.
  • FIG. 1 block diagram of a mobile radio system
  • FIG. 2 shows a schematic representation of multiple access methods
  • Figure 3 is a schematic representation of a raster scheme for frequency channel arrangement
  • Figure 4 block diagram of a radio station.
  • FIG. 1 shows a cellular mobile radio system which consists of a multiplicity of mobile switching centers MSC which are networked with one another or which provide access to a fixed network PSTN. Furthermore, these mobile switching centers MSC are each connected to at least one base station controller BSC, which can also be formed by a data processing system. Each base station controller BSC is in turn connected to at least one base station BS.
  • a base station BS is a radio station which can establish a radio connection to other radio stations, so-called mobile stations MS, via a radio interface.
  • Information can be transmitted within radio channels f which lie within frequency bands b between the mobile stations MS and the base station BS assigned to these mobile stations MS by means of radio signals.
  • the transmission of the radio signals can take place in accordance with known, ms-specific digital, methods for data transmission within predetermined frequency channels, which can also be described by a corresponding carrier frequency.
  • the signal power of the signals transmitted at these carrier frequencies is essentially, but generally not exclusively, within a predetermined range around the
  • Carrier frequency This area can also be used to describe a frequency channel.
  • the range of the radio signals of a base station essentially define a radio cell FZ.
  • the allocation of resources, such as frequency channels or spreading code sets to radio cells FZ and thus to the information to be transmitted, can be controlled by control devices, such as the base station controller BSC.
  • Base stations BS and a base station controller BSC can be combined to form a base station system BSS.
  • the base station system BSS is also responsible for radio channel management or allocation, data rate adaptation, monitoring of the radio transmission link, hand-over procedures and the allocation or signaling of the spreading codes to be used and transmits the necessary signaling information to the mobile stations MS .
  • the mobile radio systems of different network operators are often not optimally planned, so that interference problems often occur in particular in the adjacent frequency ranges of different network operators.
  • Increased interference also occurs within a network operator's mobile radio system if cells of different sizes are used in different frequency channels (different "layers"). This cell division is called hierarchical cell systems.
  • FIG. 2 shows the frame structure of a possible multiple access method, by means of which information that is transmitted via a radio interface can be separated and can be allocated to a specific connection or the corresponding subscriber.
  • a time multiple access TDMA, a frequency multiple access FDMA, a code multiple access CDMA or a combination of several of these multiple access methods can be used.
  • the frequency band bm is broken down into several frequency channels f; these frequency channels are Wer ⁇ ff TDMA divided into time slots ts.
  • the signals transmitted within a time slot ts and a frequency channel f can be separated by means of connection-specific spreading codes, so-called CDMA codes cc, which are modulated onto the information.
  • CDMA codes cc which are modulated onto the information.
  • the resulting physical channels are assigned to logical channels according to a defined scheme. There are basically two types of logical channels:
  • Signaling channels for the transmission of signaling information and traffic channels for the transmission of useful information are signaling channels for the transmission of signaling information and traffic channels for the transmission of useful information.
  • FIG. 3 shows a first coarse and a second fine grid scheme, according to which the frequency channels f are arranged within frequency bands b.
  • the frequency band b1 is assigned to a network operator and the frequency band bO is assigned to another network operator. It is also possible for both frequency bands to be assigned to one network operator.
  • Several frequency channels f are arranged within the different frequency bands b.
  • the frequency channels fl, f2, f3 within a frequency band bl can be packed more densely, i.e.
  • the internal frequency spacing di within a frequency band bl between the frequency channels fl and f2 or f2 and f3 is smaller
  • the arrangement of the frequency channels f within the grid schemes can be flexible and adapted to these physical framework conditions, depending on the physical framework conditions and network topology, so that interference, in particular between frequency channels f of different operators, is substantially avoided.
  • frequency channels f it is also possible for the frequency channels f to be arranged in accordance with further even finer or coarser raster patterns.
  • frequency channels fl, f2, f3 or their center frequencies m (carrier frequency) within a frequency band b or within a layer can also be packed so closely that they overlap. Despite the increase in interference within a frequency band or within a layer, this can also lead to an overall interference reduction due to the interference reduction between different frequency bands b or different layers.
  • the frequency range in which the fine raster pattern is defined ie in which the fine raster pattern covers a frequency range
  • the definition area of the fine screening scheme restricted by the definition area of the coarse screening scheme is thus further restricted within the definition area of the coarse screening scheme, for example by the restriction to only certain intervals within the definition area of the coarse screening scheme. ben grid schemes. So there are only parts of the frequency range covered by the coarse grid scheme also covered by the fine grid scheme, and thus defined as center frequency m.
  • the coarse grid pattern is scaled by integer numbers n, and the definition range for n can also be restricted in accordance with the limited available frequency band.
  • the fine grid scheme is scaled by integer numbers k, a zero point for the fine grid scheme being located at the scale points of the rough grid scheme n.
  • the definition range for k can be restricted, so that the fine grid scheme is only defined at certain intervals, of the entire frequency range.
  • a frequency channel for future CDMA mobile radio systems such as a wide-band CDMA system or a TD-CDMA system, which is operated in FDD (Frequency Division Duplex) or TDD (Time Division Duplex) mode, has a spread the digital signals with a chip rate of approx. 4 megachips per second a bandwidth of approx. 4MHz.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • a frequency spacing d (guard band) between the different frequency channels f is required for adjacent channel suppression.
  • This can be flexibly adapted to the respective physical framework.
  • a scaling of 5 MHz is therefore assigned to the rough grid scheme, for example.
  • a scaling of 200 kHz, for example, is assigned to the fine grid scheme.
  • the synthesizer SYN of the high-frequency part HF of the mobile station is set to all fundamentally possible center frequencies m. If necessary, it is measured whether radio signals with a certain minimum power are received in this frequency channel; if radio signals with a certain minimum power are received, they are searched for a characteristic known synchronization sequence. If this characteristic synchronization sequence is sent in this frequency channel, the mobile station MS synchronizes itself with the mobile radio system sending the synchronization sequence, processes the system information transmitted via a signaling channel and books the mobile radio system in the case of a mobile radio system for which the mobile station MS is approved on. Otherwise, the synthesizer is set to the next frequency channel.
  • the system In the event that no radio signals with a certain minimum power are transmitted on a frequency channel f or the characteristic synchronization sequence is not transmitted, the system also switches to the next frequency channel.
  • n is a whole number, for example between 0 and 12, as the scaling of the coarse grid scheme, and k as a scaling of the fine grid scheme, which describes the deviation from the rough grid scheme, is a positive or negative integer, for example with an amount less than 4, so that k * 200kHz is significantly smaller than 5MHz:
  • m fO + n * 5MHz + k * 200kHz; with - kmax ⁇ k ⁇ + kmax; fO smallest center frequency
  • Certain frequency channel arrangements are thus fundamentally excluded. This results in a significantly lower effort and energy consumption for the frequency channel search: only 1/5 of the possible frequency channels (carrier frequencies) have to be searched, sufficient flexibility to arrange frequency channels to avoid interference, the scanning time of the mobile stations for carrier frequencies can be reduced by 80% , which results in a corresponding extension of the standby time, the information for the description of a specific frequency channel can be coded and transmitted efficiently, which also improves the compatibility of future systems with existing systems, so-called systems of the second generation, such as the GSM system, because less information has to be transmitted via the signaling channels of these systems.
  • the restriction of the definition range of k can also assume another defined set of discrete values, such as for example: k: -12, -7, -3, -1, 0, 1, 3, 7.
  • the set of discrete values for k can also be different for each n.
  • Frequency channels that are used with a higher probability are therefore searched for by the mobile station MS.
  • Information about a prioritization of certain frequency channels can be stored in the mobile station MS or can be transmitted from time to time by the network operator to the mobile station MS via the mobile radio system.
  • the center frequency (carrier center frequency, carrier center frequency) can therefore be determined according to the following relationship:
  • Nc number of possible carrier positions around a carrier in the rough grid scheme
  • UARFCN number of the frequency channel used.
  • Such a carrier arrangement allows efficient coding and an efficient first synchronization. It is also within the scope of the invention not to understand m as the center frequency, but rather, for example, as the edge frequency of a radio channel, or to use another form to describe a radio channel.
  • An embodiment variant of the invention provides for the amount of the frequency channels within the scope of the invention to be changed by adding or removing frequency channels from the amount. This can also be done by prioritizing the frequency channels contained in the set. Such a change in the amount of the frequency channels to be searched can be implemented by means of corresponding data which are transmitted from the subscriber identification module or via the air interface to the control device of the radio station.
  • frequency channels can be made efficiently based on the raster scheme described above.
  • signaling information is transmitted between base station BS and mobile station MS m in a variety of situations, which also contain information about a frequency channel f, such as for carrying out an interfrequency handover or for transmitting a neighbor - channel list etc.
  • Frequency channels f or their center frequency m can be transmitted from a mobile station MS to a base station BS or vice versa with less effort and a small number of bits.
  • FIG. 4 shows a radio station, which can be a base station BS or a mobile station MS, consisting of: a control device STE, a processing device VE, a power supply device SVE and a high-frequency part HF, consisting of a receiving device EE, a transmitting device SE and a frequency synthesizer SYN and one
  • Antenna device ANT The individual elements of the radio station are also connected to one another by conductor tracks or bus systems.
  • the mobile station also contains an operating unit with a loudspeaker element and a microphone element.
  • the control device STE essentially consists of a program-controlled microcontroller and the processing device VE consists of a digital signal processor DSP, both of which have write and read access to memory modules SPE.
  • the microcontroller controls and controls all essential elements and functions of the radio station MS / BS and the communication and signaling process.
  • SPE is the program data that is needed to control the radio station and the communication sequence, in particular also the signaling procedures, device information, information generated during the processing of signals and constant information about the grid scheme of the frequency channels and its restriction of the definition area.
  • the high-frequency part HF consists of a transmitting device SE, with a modulator and an amplifier V and a receiving device EE with a demodulator and also an amplifier V.
  • the transmitting device SE and the receiving device EE are supplied with a frequency of a voltage-controlled oscillator VCO via the synthesizer SYN.
  • the synthesizer SYN and the corresponding reception filters are set by the control device STE to the desired center frequency m (carrier frequency) by means of control signals. This can be done according to the methods described above.
  • the information to be transmitted in the processing device VE is spread out before modulation by a connection-specific CDMA code (spreading code) and despread after the transmission. Also examining the received CDMA code (spreading code)
  • Radio signals relating to the characteristic synchronization sequence which may be stored in the memory modules SPE, are carried out by means of the processing device VE.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The frequency channels of a frequency band are allocated using a rough grid system and a second fine grid system. Said grid system is used more particularly to carry out an efficient channel search and for effective frequency channel coding.

Description

Beschreibungdescription
Verfahren zur Informationsübertragung und FunkstationInformation transmission method and radio station
Die Erfindung bezieht sich auf ein Verfahren und eine Funkstation zur Informationsübertragung, insbesondere mittels eines Mobilfunksysterαs, die dabei verwendete Frequenzkanalanordnung, und eine entsprechend angepaßte Frequenzkanalsuche .The invention relates to a method and a radio station for information transmission, in particular by means of a mobile radio system, the frequency channel arrangement used here, and a correspondingly adapted frequency channel search.
Bei herkömmlichen Mobilfunksystemen, wie dem GSM (Global System for Mobile Communication) -System wird zur effizienten Nutzung der Übertragungskapazitäten ein Vielfachzugriffsverfahren angewendet. Dabei werden auch gemäß einem Frequenz- Vielfachzugriff FDMA die zur Verfugung stehenden Frequenzbander m mehrere Frequenzkanale aufgeteilt. Für den GSM-Betrieb sind zwei Frequenzbander mit 45MHz Bandabstand reserviert: für den Uplmk von der Mobilstation zur Basisstation der Bereich 890MHz bis 915MHz und für den Downlmk-Betrieb von der Basisstation zur Mobilstation der Bereich 935MHz bis 960MHz. Die Frequenzbander haben eine Breite von 25MHz und werden m 124 einzelne Frequenzkanale mit jeweils 200 KHz unterteilt. Häufig wird ein Frequenzband dabei noch aufgeteilt und die entstehenden Teilfrequenzbander und die entsprechenden Fre- quenzkanale unterschiedlichen Netzbetreibern zugeteilt.In conventional mobile radio systems, such as the GSM (Global System for Mobile Communication) system, a multiple access method is used to efficiently use the transmission capacities. The frequency bands available m are also divided into several frequency channels according to a frequency multiple access FDMA. Two frequency bands with 45MHz band spacing are reserved for GSM operation: the range 890MHz to 915MHz for upmk from the mobile station to the base station and the range 935MHz to 960MHz for downlmk operation from the base station to the mobile station. The frequency bands have a width of 25MHz and are divided into 124 individual frequency channels with 200 KHz each. Frequently, a frequency band is still divided and the resulting sub-frequency bands and the corresponding frequency channels are allocated to different network operators.
Auch m zukunftigen Mobilfunksystemen, wie beispielsweise dem sich m der Standardisierung befindlichen ide-Band-CDMA- Syste kommt eventuell m Verbindung mit einem anderen Zu- griffsverfahren, wie beispielsweise einem Zeitvielfachzu- griffsverfahren TDMA, ein Frequenzvielfachzugriffsverfahren FDMA zusammen mit einem Code-Vielfachzugriffsverfahren CDMA zum Einsatz.Future mobile radio systems, such as the ide band CDMA system which is in the standardization, may also be used in connection with another access method, such as a time division access method TDMA, a frequency division multiple access method FDMA together with a code division multiple access method CDMA Commitment.
Der Erfindung liegt nun die Aufgabe zugrunde, zur Kommunikation über ein Mobilfunksystem vorhandende Frequenzbereiche so anzuordnen, zu gliedern und den einzelnen Netzbetreibern bzw. Teilnehmern zuzuordnen, daß sie zur Informationsübertragung effizient genutzt werden können.The invention is based on the object to arrange existing frequency ranges for communication via a mobile radio system, to structure and to the individual network operators or Assign participants that they can be used efficiently for information transmission.
Diese Aufgabe wird durch die Merkmale der unabhängigen Pa- tentanspruche gelost. Weiterbildungen ergeben sich aus den Unteranspruchen .This task is solved by the features of the independent patent claims. Further training results from the subclaims.
Die Erfindung beruht also auf dem Gedanken, zur Verfugung stehende Frequenzbereiche m Frequenzbander oder zumindest ein Frequenzband und Frequenzkanale aufzuteilen, und dieseThe invention is therefore based on the idea of dividing available frequency ranges m frequency bands or at least one frequency band and frequency channels, and these
Frequenzkanale gemäß einem ersten groben Rasterschema und einem zweiten feinen Rasterschema anzuordnen, wobei zumindest der Definitionsbereich des feinen Rasterschemas eingeschränktTo arrange frequency channels according to a first coarse grid scheme and a second fine grid scheme, at least restricting the definition range of the fine grid scheme
Dabei kann das grobe Rasterschema beispielsweise auch durch einen Tragerabstand (carrier spacing) und das feine Rasterschema als Subraster beschrieben werden.The rough grid scheme can also be described, for example, by a carrier spacing and the fine grid scheme as a sub-grid.
Dadurch wird erreicht, daß ein bestimmter Frequenzkanal mit weniger Informationen beschrieben werden kann, und bei der Verwendung dieser Informationen zur Durchfuhrung einer entsprechend eingeschränkten Frequenzkanalsuche eine Netzsuche bzw. Synchronisation mit weniger Aufwand durchgeführt werden kann.It is thereby achieved that a certain frequency channel can be described with less information, and when this information is used to carry out a correspondingly restricted frequency channel search, a network search or synchronization can be carried out with less effort.
Eine andere Weiterbildung der Erfindung sieht vor, daß das grobe und das feine Rasterschema durch jeweils eine variable und eine konstante Information beschrieben wird. Durch die Abspeicherung der ersten konstanten Informationen m einer Funkstation und die Übertragung der zweiten variablen Informationen zwischen den Funkstationen können Informationen zur eindeutigen Beschreibung eines Frequenzkanals mit weniger Aufwand zwischen den Funkstationen ausgetauscht werden.Another development of the invention provides that the coarse and the fine grid scheme is described by variable and constant information. By storing the first constant information in a radio station and transmitting the second variable information between the radio stations, information for clearly describing a frequency channel can be exchanged between the radio stations with less effort.
Bei einer weiteren Ausgestaltung der Erfindung werden die Informationen gemäß einem CDMA-Verfahren durchgef hrt, wobei die mittels eines CDMA-Codes gespreizten Funksignale im wesentlichen innerhalb eines Frequenzkanals übertragen werden, und die Anordnung der Frequenzkanale gemäß dem Rasterschema so an die Ubertragungsverhaltnisse angepaßt werden, daß In- terferenzen zwischen den Funksignalen der Frequenzkanale möglichst stark reduziert werden.In a further embodiment of the invention, the information is carried out in accordance with a CDMA method, wherein the radio signals spread by means of a CDMA code are transmitted essentially within a frequency channel, and the arrangement of the frequency channels is adapted to the transmission conditions in accordance with the raster pattern in such a way that interference between the radio signals of the frequency channels is reduced as much as possible.
Die Erfindung umfaßt auch Verfahren zur Informationsübertragung zwischen einer ersten Basisstation BS und einer ersten Mobilstation MS und einer zweiten Basisstation BS und einer zweiten Mobilstation MS, bei dem zur Übertragung der Informationen mehrere Frequenzkanale f zur Verfugung stehen, und die Übertragung von Informationen zwischen der ersten Basisstati- on BS und der ersten Mobilstation MS zumindest zeitweise mit- tels Funksignale im wesentlichen innerhalb eines ersten Frequenzkanals fl, und die Übertragung von Informationen zwischen der zweiten Basisstation BS und der zweiten Mobilstation MS zumindest zeitweise mittels Funksignale im wesentlichen innerhalb eines zweiten Frequenzkanals f2 erfolgt, wobei die erste und zweite Basisstation auch unterschiedlichen Netzbetreibern oder unterschiedlichen Layern eines hierarchischen Zellsystems zugeordnet sein können.The invention also includes methods for transmitting information between a first base station BS and a first mobile station MS and a second base station BS and a second mobile station MS, in which a plurality of frequency channels f are available for transmitting the information, and the transmission of information between the first base station on BS and the first mobile station MS at least temporarily by means of radio signals essentially within a first frequency channel fl, and the transmission of information between the second base station BS and the second mobile station MS takes place at least temporarily by means of radio signals essentially within a second frequency channel f2, the first and second base stations can also be assigned to different network operators or different layers of a hierarchical cell system.
Unter Übertragung versteht man im Rahmen der Anmeldung auch das Senden und/oder Empfangen von Nachrichten.In the context of registration, transmission also means sending and / or receiving messages.
Die Erfindung wird im folgenden anhand bevorzugter Ausfuh- rungsbeispiele naher beschrieben, zu deren Erläuterung die nachstehend aufgelisteten Figuren dienen:The invention is described in more detail below on the basis of preferred exemplary embodiments, the figures listed below serving to explain them:
Figur 1 Blockschaltbild eines Mobilfunksystems;Figure 1 block diagram of a mobile radio system;
Figur 2 schematische Darstellung von Vielfachzugriffsverfahren;FIG. 2 shows a schematic representation of multiple access methods;
Figur 3 schematische Darstellung eines Rasterschemas zur Frequenzkanalanordnung; Figur 4 Blockschaltbild einer Funkstation.Figure 3 is a schematic representation of a raster scheme for frequency channel arrangement; Figure 4 block diagram of a radio station.
In Figur 1 ist ein zellulares Mobilfunksystem dargestellt, das aus einer Vielzahl von Mobilvermittlungsstellen MSC besteht, die untereinander vernetzt sind, bzw. den Zugang zu einem Festnezt PSTN herstellen. Ferner sind diese Mobilvermittlungsstellen MSC mit jeweils zumindest einem Basisstationscontroler BSC verbunden, der auch durch ein Datenverarbei- tungssystem gebildet sein kann. Jeder Basisstationscontroler BSC ist wiederum mit zumindest einer Basisstation BS verbunden. Eine solche Basisstation BS ist eine Funkstation, die über eine Funkschnittstelle eine Funkverbindung zu anderen Funkstationen, sogenannten Mobilstationen MS aufbauen kann. Zwischen den Mobilstationen MS und der diesen Mobilstationen MS zugeordneten Basisstation BS können mittels Funksignalen Informationen innerhalb von Funkkanalen f die innerhalb von Frequenzbandern b liegen, übertragen werden. Die Übertragung der Funksignale kann dabei gemäß an sich bekannter, msbeson- dere digitaler, Verfahren zur Datrenubertragung innerhalb vorgegebener Frequenzkanale, die auch durch entsprechende Tragerfrequenz beschreibbar sind, erfolgen. Die Signallei- stung der auf diesen Tragerfrequenzen übertragenen Signale liegt dabei im wesentlichen, aber m der Regel nicht aus- schließlich, innerhalb eines vorgegebenen Bereichs um dieFIG. 1 shows a cellular mobile radio system which consists of a multiplicity of mobile switching centers MSC which are networked with one another or which provide access to a fixed network PSTN. Furthermore, these mobile switching centers MSC are each connected to at least one base station controller BSC, which can also be formed by a data processing system. Each base station controller BSC is in turn connected to at least one base station BS. Such a base station BS is a radio station which can establish a radio connection to other radio stations, so-called mobile stations MS, via a radio interface. Information can be transmitted within radio channels f which lie within frequency bands b between the mobile stations MS and the base station BS assigned to these mobile stations MS by means of radio signals. The transmission of the radio signals can take place in accordance with known, ms-specific digital, methods for data transmission within predetermined frequency channels, which can also be described by a corresponding carrier frequency. The signal power of the signals transmitted at these carrier frequencies is essentially, but generally not exclusively, within a predetermined range around the
Tragerfrequenz. Dieser Bereich kann auch zur Beschreibung eines Frequenzkanals herangezogen werden.Carrier frequency. This area can also be used to describe a frequency channel.
Die Reichweite der Funksignale einer Basisstation definieren im wesentlichen eine Funkzelle FZ. Die Zuteilung von Ressourcen, wie Frequenzkanale oder Spreizcodessets zu Funkzellen FZ und damit zu den zu übertragenden Informationen kann durch Steuereinrichtungen, wie beispielsweise die Basisstationscontroler BSC gesteuert werden. Basisstationen BS und ein Basis- stationscontroler BSC können zu einem Basisstationssystem BSS zusammengefaßt werden. Das Basisstationssystem BSS ist dabei auch für die Funkkanalverwaltung bzw. -Zuteilung, die Datenratenanpaßung, die Überwachung der Funkubertragungsstrecke, Hand-Over-Prozeduren und die Zuteilung bzw. Signalisierung der zu verwendenden Spreizcodes zustandig und übermittelt die dazu notigen Signa- lisierungsmformationen zu den Mobilstationen MS.The range of the radio signals of a base station essentially define a radio cell FZ. The allocation of resources, such as frequency channels or spreading code sets to radio cells FZ and thus to the information to be transmitted, can be controlled by control devices, such as the base station controller BSC. Base stations BS and a base station controller BSC can be combined to form a base station system BSS. The base station system BSS is also responsible for radio channel management or allocation, data rate adaptation, monitoring of the radio transmission link, hand-over procedures and the allocation or signaling of the spreading codes to be used and transmits the necessary signaling information to the mobile stations MS .
Bei der Realisierung von Mobilfunksystemen entsteht oft die Situation, daß geographische Gebiete durch mehrere Mobilfunk- Systeme unterschiedlicher Netzbetreiber gleichzeitig abgedeckt sind. Den unterschiedlichen Netzbetreibern werden dabei allerdings von Regulierungsbehorden m der Regel unterschiedliche Frequenzkanale zugeteilt, die sie zur Informationsübertragung Verbindungen bzw. Teilnehmern zuordnen dürfen.When realizing mobile radio systems, the situation often arises that geographical areas are covered by several mobile radio systems from different network operators at the same time. However, the various network operators are generally assigned different frequency channels by regulatory authorities, which they may assign to connections or subscribers for the transmission of information.
Durch eine nicht optimale Kooperation der unterschiedlichen Netzbetreiber werden die Mobilfunksysteme unterschiedlicher Netzbetreiber jedoch oft nicht optimal geplant, so daß insbesondere m benachbarten Frequenzbereichen unterschiedlicher Netzbetreiber oft Interferenzprobleme auftreten. Erhöhte Interferenzen treten auch innerhalb des Mobilfunksystems eines Netzbetreibers auf, wenn in unterschiedlichen Frequenzkanalen Zellen mit unterschiedlicher Große verwendet werden (unterschiedliche "Layer") . Diese Zellaufteilung nennt man hierar- chical cell Systems.Due to a non-optimal cooperation of the different network operators, the mobile radio systems of different network operators are often not optimally planned, so that interference problems often occur in particular in the adjacent frequency ranges of different network operators. Increased interference also occurs within a network operator's mobile radio system if cells of different sizes are used in different frequency channels (different "layers"). This cell division is called hierarchical cell systems.
Figur 2 zeigt die Rahmenstruktur eines möglichen Vielfachzugriffsverfahrens, mittels dessen Informationen, die über eine Funkschnittstelle übertragen werden, separiert werden können und einer bestimmten Verbindung bzw. dem entsprechenden Teilnehmer zugeteilt werden können. Dazu kann ein Zeitvielfachzu- gπff TDMA, ein Frequenzvielfachzugriff FDMA, ein Codevielfachzugriff CDMA oder eine Kombination aus mehreren dieser Vielfachzugriffsverfahren eingesetzt werden.FIG. 2 shows the frame structure of a possible multiple access method, by means of which information that is transmitted via a radio interface can be separated and can be allocated to a specific connection or the corresponding subscriber. For this purpose, a time multiple access TDMA, a frequency multiple access FDMA, a code multiple access CDMA or a combination of several of these multiple access methods can be used.
Beim FDMA wird das Frequenzband b m mehrere Frequenzkanale f zerlegt; diese Frequenzkanale werden durch den Zeitvielfach- zugπff TDMA in Zeitschlitze ts aufgeteilt. Die innerhalb eines Zeitschlitzes ts und eines Frequenzkanals f übertragenen Signale können durch verbindungsmdividuelle den Informationen aufmodulierte Spreizcodes, sogenannte CDMA-Codes cc sepa- riert werden. Die so entstehenden physikalischen Kanäle werden nach einem festgelegten Schema logischen Kanälen zugeordnet. Bei den logischen Kanälen unterscheidet man grundsätzlich zwei Arten:In the FDMA, the frequency band bm is broken down into several frequency channels f; these frequency channels are Zugπff TDMA divided into time slots ts. The signals transmitted within a time slot ts and a frequency channel f can be separated by means of connection-specific spreading codes, so-called CDMA codes cc, which are modulated onto the information. The resulting physical channels are assigned to logical channels according to a defined scheme. There are basically two types of logical channels:
Signalisierungskanale zur Übertragung von Signalisierungsm- formationen und Verkehrskanale zur Übertragung von Nutzinformationen.Signaling channels for the transmission of signaling information and traffic channels for the transmission of useful information.
Figur 3 zeigt ein erstes grobes und ein zweites feines Rasterschema, gemäß dem die Frequenzkanale f innerhalb von Fre- quenzbandern b angeordnet sind. Dabei ist beispielsweise das Frequenzband bl einem Netzbetreiber zugeordnet und das Frequenzband bO einem anderen Netzbetreiber zugeordnet. Es ist auch möglich daß beide Frequenzbander einem Netzbetreiber zugeordnet sind. Innerhalb der unterschiedlichen Frequenzbander b sind mehrere Frequenzkanale f angeordnet.FIG. 3 shows a first coarse and a second fine grid scheme, according to which the frequency channels f are arranged within frequency bands b. For example, the frequency band b1 is assigned to a network operator and the frequency band bO is assigned to another network operator. It is also possible for both frequency bands to be assigned to one network operator. Several frequency channels f are arranged within the different frequency bands b.
Die Frequenzkanale fl, f2, f3 innerhalb eines Frequenzbandes bl können dabei dichter gepackt sein, d.h. der interne Frequenzabstand di innerhalb eines Frequenzbandes bl zwischen den Frequenzkanalen fl und f2 bzw. f2 und f3 ist kleinerThe frequency channels fl, f2, f3 within a frequency band bl can be packed more densely, i.e. The internal frequency spacing di within a frequency band bl between the frequency channels fl and f2 or f2 and f3 is smaller
(kleinere Guardbander zwischen Frequenzkanalen wie beispielsweise fl und f2) als der externe Frequenzabstand de zwischen Frequenzkanalen fl und f8 unterschiedlicher Netzbetreiber (größere Guardbander zwischen Frequenzkanalen wie beispiels- weise fl und f8) und damit auch unterschiedlicher Frequenzbander b, die m der Regel unterschiedlichen Netzbetreibern zugeteilt werden. Dadurch wird erreicht, daß Interferenzprobleme, die gerade zwischen benachbarten Frequenzkanalen f8 und fl unterschiedlicher Netzbetreiber auftreten, reduziert werden. Erhöhte Interferenzen treten auch innerhalb des Mobilfunksystems eines Netzbetreibers auf, wenn m hierarchisch gegliederten sich überlagernden Funkzellen unterschiedlicher Große benachbarte Frequenzkanale f verwendet werden. Zwischen den Frequenzkanalen f unterschiedlicher Layer der hierarchischen Gliederung kann es daher ebenfalls vorteilhaft sein, einen größeren Frequenzabstand, also ein größeres Guardband einzufügen, als zwischen Frequenzkanalen f des gleichen Layers .(smaller guard bands between frequency channels such as fl and f2) than the external frequency spacing de between frequency channels fl and f8 of different network operators (larger guard bands between frequency channels such as fl and f8) and thus also different frequency bands b, which m are generally allocated to different network operators become. It is thereby achieved that interference problems which occur precisely between adjacent frequency channels f8 and fl of different network operators are reduced. Increased interference also occurs within the mobile radio system of a network operator if m hierarchically structured, overlapping radio cells of different sizes are used, adjacent frequency channels f. It can therefore also be advantageous to insert a greater frequency spacing, that is to say a larger guard band, between the frequency channels f of different layers of the hierarchical structure than between frequency channels f of the same layer.
Die Anordnung der Frequenzkanale f innerhalb der Rasterschemen kann je nach physikalischen Rahmenbedingungen und Netzto- pologie flexibel und angepaßt an diese physikalischen Rahmen- oedmgungen so erfolgen, daß Interferenzen insbesondere zwi- scnen Frequenzkanalen f unterschiedlicher Betreiber im We- sentlichen vermieden werden.The arrangement of the frequency channels f within the grid schemes can be flexible and adapted to these physical framework conditions, depending on the physical framework conditions and network topology, so that interference, in particular between frequency channels f of different operators, is substantially avoided.
Es ist auch möglich, daß die Anordnung der Frequenzkanale f gemäß weiterer noch feinerer bzw. gröberer Rasterschemen erfolgt .It is also possible for the frequency channels f to be arranged in accordance with further even finer or coarser raster patterns.
Ferner können Frequenzkanale fl, f2, f3 bzw. deren Mittenfrequenzen m ( Tragerfrequenz) innerhalb eines Frequenzbandes b bzw. innerhalb eines Layers auch so dicht gepackt werden, daß sie überlappen. Auch dies kann trotz der Interferenzzunahme innerhalb eines Frequenzbandes bzw. innerhalb eines Layers aufgrund der Interferenzreduzierung zwischen unterschiedlichen Frequenzbandern b bzw. unterschiedlichen Layern zu einer Gesamtinterferenzreduzierung fuhren.Furthermore, frequency channels fl, f2, f3 or their center frequencies m (carrier frequency) within a frequency band b or within a layer can also be packed so closely that they overlap. Despite the increase in interference within a frequency band or within a layer, this can also lead to an overall interference reduction due to the interference reduction between different frequency bands b or different layers.
Der Frequenzbereich, m dem das feine Rasterschema definiert ist, m dem also das feine Rasterschema einen Frequenzbereich abdeckt, kann eingeschränkt sein. Der durch den Defmtionsbe- reich des groben Rasterschemas eingeschränkte Defmitionsbe- reich des feinen Rasterschemas ist also innerhalb des Defini- tionsbereichs des groben Rasterschemas noch weiter eingeschränkt, beispielsweise durch die Einschränkung auf nur bestimmte Intervalle innerhalb des Definitionsbereichs des gro- ben Rasterschemas. Es sind also nur Teile des Frequenzbereichs, der durch das grobe Rasterschema abgedeckt ist auch durch das feine Rasterschema abgedeckt, und somit als Mitten- freuenz m definiert.The frequency range in which the fine raster pattern is defined, ie in which the fine raster pattern covers a frequency range, can be restricted. The definition area of the fine screening scheme restricted by the definition area of the coarse screening scheme is thus further restricted within the definition area of the coarse screening scheme, for example by the restriction to only certain intervals within the definition area of the coarse screening scheme. ben grid schemes. So there are only parts of the frequency range covered by the coarse grid scheme also covered by the fine grid scheme, and thus defined as center frequency m.
Die Skalierung des groben Rasterschemas erfolgt durch ganzzahlige Zahlen n, wobei auch der Definitionsbereich für n entsprechend des begrenzten zur Verfugung stehenden Frequenzbandes eingeschränkt sein kann. Die Skalierung des feinen Ra- sterschemas erfolgt durch ganzzahlige Zahlen k, wobei jeweils an den Skalierungspunkten des groben Rasterschemas n ein Nullpunkt für das feine Rasterschema liegt. Der Definitionsbereich für k kann eingeschränkt sein, so daß das feine Rasterschema nur in bestimmten Intervallen, des gesamten Fre- quenzbereiches definiert ist.The coarse grid pattern is scaled by integer numbers n, and the definition range for n can also be restricted in accordance with the limited available frequency band. The fine grid scheme is scaled by integer numbers k, a zero point for the fine grid scheme being located at the scale points of the rough grid scheme n. The definition range for k can be restricted, so that the fine grid scheme is only defined at certain intervals, of the entire frequency range.
Ein Frequenzkanal für zukunftige CDMA-Mobilfunksysteme, wie ein Wide-Band-CDMA-System oder ein TD-CDMA-System, das im FDD (Frequency Division Duplex) - oder TDD (Time Division Duplex)- Modus betrieben wird, hat entsprechend einer Spreizung der digitalen Signale mit einer Chiprate von ca. 4 Megachips pro Sekunde eine Bandbreite von ca. 4MHz .A frequency channel for future CDMA mobile radio systems, such as a wide-band CDMA system or a TD-CDMA system, which is operated in FDD (Frequency Division Duplex) or TDD (Time Division Duplex) mode, has a spread the digital signals with a chip rate of approx. 4 megachips per second a bandwidth of approx. 4MHz.
Aufgrund des langsam abfallenden Modulationsspektrums ist zur Nachbarkanalunterdruckung ein Frequenzabstand d (Guardband) zwischen den unterschiedlichen Frequenzkanalen f notig. Dieser kann flexibel an die jeweiligen physikalischen Rahmenbedingungen angepaßt werden. Dem groben Rasterschema wird daher beispielsweise eine Skalierung von 5MHz zugewiesen. Dem fei- nen Rasterschema wird eine Skalierung beispielsweise von 200kHz zugewiesen.Due to the slowly decreasing modulation spectrum, a frequency spacing d (guard band) between the different frequency channels f is required for adjacent channel suppression. This can be flexibly adapted to the respective physical framework. A scaling of 5 MHz is therefore assigned to the rough grid scheme, for example. A scaling of 200 kHz, for example, is assigned to the fine grid scheme.
Basierend auf diesen Rasterschemen sind nur Frequenzkanale f definiert, deren Mittenfrequenz m auf einem Skalenpunkt des feinen Rasterschemas liegt, wobei das feine Rasterschema derart eingeschränkt ist, daß es nur m bestimmten Intervallen um die Skalenpunkte des groben Rasterschemas definiert ist. Im folgenden wird ein auf dem oben beschriebenen Rasterschema basierendes Verfahren zur eingeschränkten Frequenzkanalsuche oder Kanalsuche (Scannen) beschrieben, das durch die Ein- schrankung des Definitionsbereiches des feinen Rasterschemas energiesparend durchgeführt werden kann.Based on these raster schemes, only frequency channels f are defined whose center frequency m lies on a scale point of the fine raster scheme, the fine raster scheme being restricted in such a way that it is defined only m specific intervals around the scale points of the rough raster scheme. In the following, a method for restricted frequency channel search or channel search (scanning) based on the raster scheme described above is described, which can be carried out in an energy-saving manner by restricting the definition range of the fine raster scheme.
Nach dem Einschalten einer Mobilstation MS, insbesondere im Ausland, oder in anderen Situationen, m denen die Mobilsta- tion MS versucht, sich in ein Mobilfunksystem neu einzubuchten, wird der Synthesizer SYN des Hochfrequenzteils HF der Mobilstation auf alle grundsätzlich möglichen Mittenfrequenzen m eingestellt. Es wird gegebenenfalls gemessen, ob m diesem Frequenzkanal Funksignale mit einer bestimmten Mm- destleistung empfangen werden; werden Funksignale mit einer bestimmten Mindestleistung empfangen, so werden sie nach einer charakteristischen bekannten Synchronisationsfolge abgesucht. Wird m diesem Frequenzkanal diese charakteristische Synchronisationsfolge gesendet, so synchronisiert sich die Mobilstation MS mit dem die Synchronisationsfolge sendenden Mobilfunksystem, verarbeitet die über einen Signalisierungs- kanal ausgesendeten Systeminformationen und bucht sich im Falle eines Mobilfunksystems, für das die Mobilstation MS zugelassen ist, m das Mobilfunksystem ein. Andernfalls wird der Synthesizer auf den nächsten Frequenzkanal eingestellt.After switching on a mobile station MS, in particular abroad, or in other situations, in which the mobile station MS tries to log into a mobile radio system again, the synthesizer SYN of the high-frequency part HF of the mobile station is set to all fundamentally possible center frequencies m. If necessary, it is measured whether radio signals with a certain minimum power are received in this frequency channel; if radio signals with a certain minimum power are received, they are searched for a characteristic known synchronization sequence. If this characteristic synchronization sequence is sent in this frequency channel, the mobile station MS synchronizes itself with the mobile radio system sending the synchronization sequence, processes the system information transmitted via a signaling channel and books the mobile radio system in the case of a mobile radio system for which the mobile station MS is approved on. Otherwise, the synthesizer is set to the next frequency channel.
Für die Falle, daß auf einem Frequenzkanal f keine Funksignale mit einer bestimmten Mindestleistung gesendet werden oder die charakteristische Synchronisationsfolge nicht übertragen wird, wird ebenfalls auf den nächsten Frequenzkanal übergegangen.In the event that no radio signals with a certain minimum power are transmitted on a frequency channel f or the characteristic synchronization sequence is not transmitted, the system also switches to the next frequency channel.
Bei herkömmlichen Verfahren zur Kanalsuche werden dabei alle grundsätzlich möglichen Mittenfrequenzen m, beispielsweise m 200kHz-Schπtten durchsucht. Dadurch ist die Kanalsuche insbesondere im Ausland, wo keine Vorabinformationen über die Mittenfrequenzen bekannt sind, sehr aufwendig. Dagegen sind bei einer Weiterbildung der Erfindung grundsätzlich nur Frequenzkanäle f mit einer Mittenfrequenz m von n * 5MHz + k * 200kHz zugelassen. Dabei ist n als Skalierung des groben Rasterschemas eine ganze Zahl beispielsweise zwischen 0 und 12, und k als Skalierung des feinen Rasterschemas, das die Abweichung vom groben Rasterschema beschreibt eine positive oder negative ganze Zahl, beispielsweise mit einem Betrag kleiner 4, so daß k * 200kHz deutlich kleiner als 5MHz ist:In conventional methods for channel search, all fundamentally possible center frequencies m, for example m 200 kHz sections, are searched. As a result, the channel search is very complex, especially abroad, where no prior information about the center frequencies is known. In contrast, in a further development of the invention, only frequency channels f with a center frequency m of n * 5 MHz + k * 200 kHz are permitted. Here, n is a whole number, for example between 0 and 12, as the scaling of the coarse grid scheme, and k as a scaling of the fine grid scheme, which describes the deviation from the rough grid scheme, is a positive or negative integer, for example with an amount less than 4, so that k * 200kHz is significantly smaller than 5MHz:
m = fO + n * 5MHz + k * 200kHz; mit - kmax < k < + kmax; fO kleinste Mittenfrequenzm = fO + n * 5MHz + k * 200kHz; with - kmax <k <+ kmax; fO smallest center frequency
Bestimmte Frequenzkanalanordnungen werden so grundsätzlich ausgeschlossen. Dadurch ergibt sich ein deutlich geringerer Aufwand und Energieverbrauch für die Frequenzkanalsuche: nur 1/5 der möglichen Frequenzkanäle (Trägerfrequenzen) müssen abgesucht werden, ausreichende Flexibilität zur Anordnung von Frequenzkanälen, um Intreferenzen zu vermeiden, die Scandauer der Mobilstationen nach Trägerfrequenzen kann um 80% reduziert werden, was eine entsprechende Verlängerung der Standbyzeit zu Folge hat, die Informationen zur Beschreibung eines bestimmten Frequenzkanals können effizient codiert und übertragen werden, was auch die Kompatibilität zukünftiger Systeme zu bereits vorhandenen Systemen, sog. Systemen der zweiten Generation, wie z.B. das GSM-System, erhöht, da weniger Informationen über die Signalisierungskanäle dieser Systeme zu übertragen sind.Certain frequency channel arrangements are thus fundamentally excluded. This results in a significantly lower effort and energy consumption for the frequency channel search: only 1/5 of the possible frequency channels (carrier frequencies) have to be searched, sufficient flexibility to arrange frequency channels to avoid interference, the scanning time of the mobile stations for carrier frequencies can be reduced by 80% , which results in a corresponding extension of the standby time, the information for the description of a specific frequency channel can be coded and transmitted efficiently, which also improves the compatibility of future systems with existing systems, so-called systems of the second generation, such as the GSM system, because less information has to be transmitted via the signaling channels of these systems.
Eine weitere Ausgestaltung zur effizienten Kanalsuche sieht vor, daß zuerst die Frequenzkanäle f mit der Mittenfrequenz m= n * 5MHz abgesucht werden, dann die Frequenzkanäle f mit der Mittenfrequenz m = n * 5MHz ± 1 * 200kHz, dann die Frequenzkanäle f mit der Mittenfrequenz m = n * 5MHz ± 2 * 200kHz, usw. bis m = n * 5MHz ± kmax * 200kHz. Eine andere Ausgestaltung zur effizienten Kanalsuche sieht vor, daß zuerst die Frequenzkanale f mit der Mittenfrequenz m= n * 5MHz abgesucht werden, dann die Frequenzkanale f mit der Mittenfrequenz m = n * 5MHz ± kmax * 200kHz, dann dieAnother embodiment for efficient channel search provides that first the frequency channels f are searched with the center frequency m = n * 5MHz, then the frequency channels f with the center frequency m = n * 5MHz ± 1 * 200kHz, then the frequency channels f with the center frequency m = n * 5MHz ± 2 * 200kHz, etc. to m = n * 5MHz ± kmax * 200kHz. Another embodiment for efficient channel search provides that first the frequency channels f are searched with the center frequency m = n * 5MHz, then the frequency channels f with the center frequency m = n * 5MHz ± kmax * 200kHz, then the
Frequenzkanale f mit der Mittenfrequenz m = n * 5MHz ± (kmax - 1) * 200kHz, usw. bis zu Frequenzkanale f mit der Mittenfrequenz m = n * 5MHz ± 1 * 200kHz.Frequency channels f with the center frequency m = n * 5MHz ± (kmax - 1) * 200kHz, etc. up to frequency channels f with the center frequency m = n * 5MHz ± 1 * 200kHz.
Die Einschränkung des Definitionsbereiches von k kann auch einen anderen definierten Satz diskreter Werte annehmen, wie beispielsweise: k: -12, -7, -3, -1, 0, 1, 3, 7. Dabei kann der Satz diskreter Werte für k auch für jedes n verschieden sein.The restriction of the definition range of k can also assume another defined set of discrete values, such as for example: k: -12, -7, -3, -1, 0, 1, 3, 7. The set of discrete values for k can also be different for each n.
Es werden also Frequenzkanale, die mit einer größeren Wahrscheinlichkeit benutzt werden, von der Mobilstation MS pπo- risiert abgesucht. Informationen über eine Priorisierung von bestimmten Frequenzkanalen können m der Mobilstation MS ab- gespeichert sein oder von Zeit zu Zeit durch den Netzbetreiber über das Mobilfunksystem an die Mobilstation MS übertragen werden.Frequency channels that are used with a higher probability are therefore searched for by the mobile station MS. Information about a prioritization of certain frequency channels can be stored in the mobile station MS or can be transmitted from time to time by the network operator to the mobile station MS via the mobile radio system.
Die Mittenfrequenz (Tragermittenfrequenz, carrier center fre- quency kann also gemäß folgender Beziehung bestimmt werden:The center frequency (carrier center frequency, carrier center frequency) can therefore be determined according to the following relationship:
m = f0 + n * fs + k * 200kHz; mit fO kleinste Mittenfrequenz , wobei m einem Ausfu rungsbei- spiel der Erfindung gilt: n = UARFCN di Nc r k = (UARFCN od Nc) - (Nc div 2)m = f0 + n * fs + k * 200kHz; with fO smallest center frequency, whereby in one embodiment of the invention applies: n = UARFCN di Nc r k = (UARFCN od Nc) - (Nc div 2)
Nc = Anzahl möglicher Tragerpositionen um einen Trager im groben RasterschemaNc = number of possible carrier positions around a carrier in the rough grid scheme
UARFCN = Nummer des genutzten Frequenzkanals. Die erste Mittenfrequenz fO, fs (beispielsweise = 5MHZ) und die Anzahl der Trager im feineren Rasterschema Nc hangen dabei von der benutzten Chiprate und vom Frequenzband ab.UARFCN = number of the frequency channel used. The first center frequency fO, fs (for example = 5MHZ) and the number of carriers in the finer grid scheme Nc depend on the chip rate used and on the frequency band.
Eine derartige Trageranordnung erlaubt eine effiziente Codierung und eine effiziente erste Synchronisation. Es liegt auch im Rahmen der Erfindung, m nicht als Mittenfrequenz, sondern beispielsweise als Randfrequenz eines Funkkanals aufzufassen, oder auf eine andere Form zur Beschreibung eines Funkkanals zu verwenden.Such a carrier arrangement allows efficient coding and an efficient first synchronization. It is also within the scope of the invention not to understand m as the center frequency, but rather, for example, as the edge frequency of a radio channel, or to use another form to describe a radio channel.
Eine Ausfuhrungsvariante der Erfindung sieht vor, die Menge der im Rahmen der Erfindung befindlichen Frequenzkanale zu andern, indem Frequenzkanale der Menge hinzugefugt werden oder daraus entfernt werden. Dies kann auch durch eine Prio- risierung der m der Menge enthaltenen Frequenzkanale erfolgen. Eine derartige Änderung der Menge der abzusuchenden Frequenzkanale kann durch entsprechende Daten, die vom Teilneh- meridentiflzierungsmodul oder über die Luftschnittstelle an die Steuereinrichtung der Funkstation übermittelt werden, realisiert werden.An embodiment variant of the invention provides for the amount of the frequency channels within the scope of the invention to be changed by adding or removing frequency channels from the amount. This can also be done by prioritizing the frequency channels contained in the set. Such a change in the amount of the frequency channels to be searched can be implemented by means of corresponding data which are transmitted from the subscriber identification module or via the air interface to the control device of the radio station.
Ferner kann eine Beschreibung von Frequenzkanalen auf dem oben beschriebenen Rasterschema basierend effizient erfolgen.Furthermore, a description of frequency channels can be made efficiently based on the raster scheme described above.
Zur Verwaltung bzw. zum Betreiben eines Mobilfunksystems werden insbesondere zwischen Basisstation BS und Mobilstation MS m einer Vielzahl von Situationen Signalisierungsmformatio- nen übertragen, die auch Informationen über einen Frequenzka- nal f enthalten, wie beispielsweise zur Durchfuhrung eines Interfrequency-Handovers oder zur Übertragung einer Nachbar- kanalliste usw.In order to manage or operate a mobile radio system, signaling information is transmitted between base station BS and mobile station MS m in a variety of situations, which also contain information about a frequency channel f, such as for carrying out an interfrequency handover or for transmitting a neighbor - channel list etc.
Durch die Beschreibung bzw. Codierung eines Frequenzkanals f mittels der oben beschriebenen Rasterschemen bzw. den entsprechenden Skalierungen, können beispielsweise zur Übertragung der Information "Frequenzkanal mit einer Mittenfrequenz von 10,6MHz" die variablen Informationen n = 2, k = 3 (erste variable Information) übertragen werden, und diese m der empfangenden Funkstation zusammen mit den dort abgespeicherten konstanten Informationen 5MHz, 200kHz (zweite konstante Information) zur Bestimmung der Mittenfrequenz m folgendermaßen verwendet werden:By describing or coding a frequency channel f by means of the raster schemes described above or the corresponding scaling, it is possible, for example, to transmit the information “frequency channel with a center frequency from 10.6MHz "the variable information n = 2, k = 3 (first variable information) are transmitted, and this m to the receiving radio station together with the constant information 5MHz, 200kHz (second constant information) stored there for determining the center frequency m as follows be used:
m = 2 * 5MHz + 3 * 200kHz = 10, 6MHzm = 2 * 5MHz + 3 * 200kHz = 10.6MHz
Gegebenenfalls kann dazu noch ein konstanter abgespeicherter Wert fO hinzuaddiert werden:If necessary, a constant stored value fO can be added:
m = fO + 2 * 5MHz + 3 * 200kHz = fO + 10, 6MHzm = fO + 2 * 5MHz + 3 * 200kHz = fO + 10.6MHz
So können Informationen über zu verwendende oder verwendeteSo information about to be used or used
Frequenzkanale f bzw. deren Mittenfrequenz m mit weniger Aufwand und einer geringen Bitzahl von einer Mobilstation MS zu einer Basisstation BS oder umgekehrt übermittelt werden.Frequency channels f or their center frequency m can be transmitted from a mobile station MS to a base station BS or vice versa with less effort and a small number of bits.
Figur 4 zeigt eine Funkstation, die eine Basisstation BS oder eine Mobilstation MS sein kann, bestehend aus: einer Steuereinrichtung STE, einer Verarbeitungseinrichtung VE, einer Stromversorgungseinrichtung SVE und einem Hochfrequenzteil HF, bestehend aus einer Empfangseinrichtung EE, einer Sende- emrichtung SE und einem Frequenzsynthesizer SYN und einerFIG. 4 shows a radio station, which can be a base station BS or a mobile station MS, consisting of: a control device STE, a processing device VE, a power supply device SVE and a high-frequency part HF, consisting of a receiving device EE, a transmitting device SE and a frequency synthesizer SYN and one
Antenneneinrichtung ANT . Die einzelnen Elemente der Funkstation sind auch durch Leiterbahnen oder Bussysteme miteinander verbunden. Die Mobilstation enthalt darüber hinaus eine Bedieneinheit mit Lautsprecherelement und Mikrophonelement.Antenna device ANT. The individual elements of the radio station are also connected to one another by conductor tracks or bus systems. The mobile station also contains an operating unit with a loudspeaker element and a microphone element.
Die Steuereinrichtung STE besteht im wesentlichen aus einem programmgesteuerten Mikrocontroler und die Verarbeitungseinrichtung VE aus einem digitalen Signalprozessor DSP, wobei beide schreibend und lesend auf Speicherbausteine SPE zugrei- fen können. Der Mikrocontroler steuert und kontrolliert alle wesentlichen Elemente und Funktionen der Funkstation MS/BS und den Kommu- ikations- und Signalisierungsablauf .The control device STE essentially consists of a program-controlled microcontroller and the processing device VE consists of a digital signal processor DSP, both of which have write and read access to memory modules SPE. The microcontroller controls and controls all essential elements and functions of the radio station MS / BS and the communication and signaling process.
In den fluchtigen oder nicht-fluchtigen SpeicherbausteinenIn the volatile or non-volatile memory modules
SPE sind die Programmdaten, die zur Steuerung der Funkstation und des Kommunikationsabiaufs, insbesondere auch der Signali- sierungsprozeduren benotigt werden, Gerateinformationen, wahrend der Verarbeitung von Signalen entstehende Informationen und konstante Informationen über das Rasterschema der Frequenzkanale und dessen Einschränkung des Definitionsbereiches gespeichert .SPE is the program data that is needed to control the radio station and the communication sequence, in particular also the signaling procedures, device information, information generated during the processing of signals and constant information about the grid scheme of the frequency channels and its restriction of the definition area.
Der Hochfrequenzteil HF besteht aus einer Sendeeinrichtung SE, mit einem Modulator und einem Verstarker V und einer Empfangseinrichtung EE mit einem Demodulator und ebenfalls einem Verstarker V. Der Sendeeinrichtung SE und der Empfangseinrichtung EE wird über den Synthesizer SYN eine Frequenz eines spannungsgeregelten Oszillators VCO zugeführt. Zur Frequenz- kanalsuche und zur Informationsübertragung wird der Synthesizer SYN und die entsprechenden Empfangsfllter durch die Steuereinrichtung STE mittels Steuersignale auf die gewünschte Mittenfrequenz m (Tragerfrequenz) eingestellt. Dies kann gemäß oben beschriebener Verfahren erfolgen.The high-frequency part HF consists of a transmitting device SE, with a modulator and an amplifier V and a receiving device EE with a demodulator and also an amplifier V. The transmitting device SE and the receiving device EE are supplied with a frequency of a voltage-controlled oscillator VCO via the synthesizer SYN. For frequency channel search and for information transmission, the synthesizer SYN and the corresponding reception filters are set by the control device STE to the desired center frequency m (carrier frequency) by means of control signals. This can be done according to the methods described above.
Bei einer CDMA-Ubertragung bzw. bei CDMA-Funkstationen werden die zu übertragenden Informationen m der Verarbeitungseinrichtung VE vor der Modulation durch einen verbindungsindividuellen CDMA-Code (Spreizcode) gespreizt und nach der Uber- tragung entspreizt. Auch die Untersuchung der empfangenenIn the case of a CDMA transmission or in the case of CDMA radio stations, the information to be transmitted in the processing device VE is spread out before modulation by a connection-specific CDMA code (spreading code) and despread after the transmission. Also examining the received
Funksignale bezüglich der charakteristischen, gegebenfalls m den Speicherbausteinen SPE gespeicherten Synchronisationsfolge erfolgt mittels der Verarbeitungseinrichtung VE. Radio signals relating to the characteristic synchronization sequence, which may be stored in the memory modules SPE, are carried out by means of the processing device VE.

Claims

Patentansprüche claims
1. Verfahren zur Informationsübertragung zwischen einer Basisstation (BS) und einer Mobilstation (MS) , bei dem a) zur Übertragung der Informationen ein Frequenzband (bl) zur Verfugung steht, das mehrere Frequenzkanale (f) enthalt, b) die Übertragung von Informationen zumindest zeitweise mittels Funksignale im wesentlichen innerhalb eines Frequenzkanals (fl) erfolgt, c) die Anordnung der Frequenzkanale (f) innerhalb des Frequenzbandes (bl) gemäß einem ersten groben Rasterschema und einem zweiten feinen Rasterschema erfolgt, und d) zumindest der Definitionsbereich des feinen Rasterschemas eingeschränkt ist.1. A method for information transmission between a base station (BS) and a mobile station (MS), in which a) a frequency band (bl) is available for the transmission of the information, which contains several frequency channels (f), b) the transmission of information at least at times by means of radio signals essentially within a frequency channel (fl), c) the frequency channels (f) are arranged within the frequency band (bl) according to a first coarse grid pattern and a second fine grid pattern, and d) at least the range of definition of the fine grid pattern is restricted is.
2. Verfahren nach Anspruch 1, bei dem die Mobilstation (MS) entsprechend der Informationen über die Einschränkung des Definitionsbereichs des feinen Rasterschemas nur eine eingeschränkte Frequenzkanalsuche durchfuhrt.2. The method according to claim 1, in which the mobile station (MS) only carries out a restricted frequency channel search in accordance with the information about the restriction of the definition range of the fine raster scheme.
3. Verfahren nach Anspruch 2, bei dem bei der Durchf hrung der eingeschränkten Frequenzkanalsuche bestimmte Werte des eingeschränkten Definitionsbereichs des feinen Rasterschemas bevorzugt abgesucht werden.3. The method as claimed in claim 2, in which certain values of the restricted definition range of the fine raster scheme are preferably searched when performing the restricted frequency channel search.
4. Verfahren nach einem der vorhergehenden Ansprüche, bei dem a) das grobe und das feine Rasterschema durch jeweils eine erste variable Information (k,n) und eine zweite konstante Information beschrieben wird, b) ein Frequenzkanal (f) durch jeweils erste variable Informationen (k,n) und zweite konstante Informationen eindeutig beschreibbar ist, c) erste konstante Informationen m der Mobilstation (MS) abgespeichert sind, und d) zweite variable Informationen (k,n) zur Mobilstation (MS) übertragen werden. 4. The method according to any one of the preceding claims, in which a) the coarse and the fine grid scheme is described by a first variable information (k, n) and a second constant information, b) a frequency channel (f) by first variable information (k, n) and second constant information can be clearly written, c) first constant information m of the mobile station (MS) is stored, and d) second variable information (k, n) is transmitted to the mobile station (MS).
5. Verfahren nach einem der vorhergehenden Ansprüche, bei dem a) das grobe und das feine Rasterschema durch jeweils eine erste variable Information und eine zweite konstante Information beschrieben wird, b) ein Frequenzkanal (f) durch jeweils erste variable Informationen (k,n) und zweite konstante Informationen eindeutig beschreibbar ist, c) erste konstante Informationen m der Basisstation (BS) abgespeichert sind, und d) zweite variable Informationen (k,n) zur Basisstation (BS) übertragen werden.5. The method according to any one of the preceding claims, in which a) the coarse and the fine grid scheme is described by first variable information and second constant information, b) a frequency channel (f) by first variable information (k, n) and second constant information can be clearly described, c) first constant information m of the base station (BS) is stored, and d) second variable information (k, n) is transmitted to the base station (BS).
6. Verfahren nach einem der vorhergehenden Ansprüche, bei dem a) die Übertragung der Informationen gemäß einem CDMA- Verfahren durchgeführt wird, wobei die mittels eines CDMA- Codes gespreizten Funksignale im wesentlichen innerhalb eines Frequenzkanals (fl) übertragen werden, und b) die Anordnung der Frequenzkanale (f) gemäß einem ersten groben Rasterschema und einem zweiten feinen Rasterschema erfolgt, wobei die Frequenzabstande (de,dι) zwischen den Frequenzkanalen (f) individuell so gewählt werden, daß Interfe- renzen zwischen den Funksignalen der Frequenzkanale (f) reduziert werden.6. The method according to any one of the preceding claims, in which a) the transmission of the information is carried out in accordance with a CDMA method, the radio signals spread by means of a CDMA code being transmitted essentially within a frequency channel (fl), and b) the arrangement the frequency channels (f) are carried out according to a first coarse raster scheme and a second fine raster scheme, the frequency spacings (de, dι) between the frequency channels (f) being selected individually in such a way that interferences between the radio signals of the frequency channels (f) are reduced .
7. Verfahren zur Informationsübertragung zwischen einer Basisstation (BS) und einer Mobilstation (MS), wobei die Uber- tragung mittels Funksignale erfolgt, die im wesentlichen innerhalb von Frequenzkanalen liegen, die aus einer bestimmten vorgegebenen Menge von Frequenzkanalen entnehmbar sind, wobei diese Menge durch die entsprechenden Tragermittenfrequenzen m gemäß folgender Beziehung beschreibbar ist: m - fO + n * fs + k * 200kHz, mit - kmax < k < + kmax, 0 < n < nmax, m Tragermittenfrequenz, fs Tragerabstand, fO kleinste Tragermittenfrequenz.7. A method for the transmission of information between a base station (BS) and a mobile station (MS), the transmission being carried out by means of radio signals which are essentially within frequency channels which can be extracted from a specific predetermined quantity of frequency channels, this quantity being determined by the corresponding carrier center frequencies m can be described according to the following relationship: m - fO + n * fs + k * 200kHz, with - kmax <k <+ kmax, 0 <n <nmax, m carrier center frequency, fs carrier spacing, fO smallest carrier center frequency.
8. Verfahren zur Frequenzkanalsuche, bei dem zur Frequenz- kanalsuche nur oder priorisiert Frequenzkanale aus einer bestimmten vorgegebenen Menge von Frequenzkanalen herangezogen werden, wobei diese Menge durch die entsprechenden Tragermittenfrequenzen gemäß folgender Beziehung beschreibbar ist: m = fO + n * fs + k * 200kHz, mit - kmax < k < + kmax, 0 < n < nmax, m Tragermittenfrequenz, fs Tragerabstand, fO kleinste Tragermittenfrequenz.8. A method for frequency channel search, in which frequency channels from a specific predetermined quantity of frequency channels are used only or in a prioritized manner for frequency channel search, this quantity being describable by the corresponding carrier center frequencies in accordance with the following relationship: m = fO + n * fs + k * 200 kHz , with - kmax <k <+ kmax, 0 <n <nmax, m carrier center frequency, fs carrier spacing, fO lowest carrier center frequency.
9. Verfahren zur Frequenzkanalsuche, bei dem zur Frequenzkanalsuche nur oder priorisiert Frequenzkanale aus einer bestimmten vorgegebenen Menge von Frequenzkanalen herangezogen werden, wobei diese Menge durch die entsprechenden Tragermittenfrequenzen m gemäß folgender Beziehung beschreibbar ist: m = f0 + n * fs + k * 200kHz; mit fO kleinste Mittenfrequenz , n = UARFCN div Nc r, k = (UARFCN mod Nc) - (Nc div 2),9. A method for frequency channel search, in which frequency channels from a specific predetermined quantity of frequency channels are used only or in a prioritized manner for frequency channel search, this quantity being describable by the corresponding carrier center frequencies m in accordance with the following relationship: m = f0 + n * fs + k * 200 kHz; with fO lowest center frequency, n = UARFCN div Nc r, k = (UARFCN mod Nc) - (Nc div 2),
Nc = Anzahl möglicher Tragerpositionen um einen Trager im groben Rasterschema,Nc = number of possible carrier positions around a carrier in the rough grid scheme,
UARFCN = Nummer des genutzten Frequenzkanals.UARFCN = number of the frequency channel used.
10. Funkstation (MS/BS) mit a) Mitteln zur Übertragung (STE, HF, VE, ANT) von Informationen m einem Frequenzband (bl), das mehrere Frequenzkanale (f) enthalt, wobei die Übertragung von Informationen zumindest zeitweise mittels Funksignale im wesentlichen innerhalb eines Frequenzkanals (fl) erfolgt, und die Anordnung der Frequenzkanale (f) innerhalb des Frequenzbandes (bl) gemäß einem ersten groben Rasterschema und einem zweiten feinen Rasterschema erfolgt, und b) Mitteln zur Speicherung (SPE) von Informationen über eine Einschränkung des Definitionsbereichs zumindest des feinen Rasterschemas.10. Radio station (MS / BS) with a) means for the transmission (STE, HF, VE, ANT) of information in a frequency band (bl) which contains several frequency channels (f), the transmission of information at least temporarily by means of radio signals in the takes place essentially within a frequency channel (fl), and the arrangement of the frequency channels (f) within the frequency band (bl) according to a first coarse grid scheme and a second fine grid scheme, and b) means for storing (SPE) information about a restriction of the definition range of at least the fine grid scheme.
11. Funkstation (MS/BS) nach Anspruch 10 mit11. radio station (MS / BS) according to claim 10 with
Mitteln zur Durchfuhrung (STE, HF, VE, ANT) einer entsprechend der Informationen über die Einschränkung des Defmitionsbe- reichs des feinen Rasterschemas eingeschränkten Frequenzkanalsuche .Means for carrying out (STE, HF, VE, ANT) a frequency channel search restricted in accordance with the information about the restriction of the definition range of the fine raster scheme.
12. Funkstation (MS/BS) nach einem der Ansprüche 10 bis 1112. radio station (MS / BS) according to one of claims 10 to 11
Mitteln zur Speicherung (SPE) von ersten konstanten Informationen zur Beschreibung des groben und des feinen Rasterschemas .Means for storing (SPE) first constant information for describing the coarse and the fine raster scheme.
13. Funkstation (MS/BS) nach einem der Ansprüche 10 bis 1213. radio station (MS / BS) according to one of claims 10 to 12
Mitteln zur Bestimmung (STE) eines Frequenzkanals aus ersten gespeicherten konstanten Informationen und zweiten übertragenen variablen Informationen.Means for determining (STE) a frequency channel from first stored constant information and second transmitted variable information.
14. Funkstation (MS/BS) nach einem der Ansprüche 10 bis 1314. radio station (MS / BS) according to one of claims 10 to 13
a) Mitteln zur Übertragung (HF, STE, VE, ANT) von Informationen gemäß einem CDMA-Verfahren, wobei die mittels eines CDMA- Codes gespreizten Funksignale im wesentlichen innerhalb eines Frequenzkanals (f) übertragen werden, b) Mitteln zur Einstellung (STE) der zu verwendenden Frequenzkanale (f) gemäß einem ersten groben Rasterschema und einem zweiten feinen Rasterschema, wobei die Frequenzabstande (de, di) zwischen den Frequenzkanalen (f) individuell so ge- wählt werden, daß Interferenzen zwischen den Funksignalen der Frequenzkanale (f) reduziert werden. a) means for the transmission (HF, STE, VE, ANT) of information in accordance with a CDMA method, the radio signals spread by means of a CDMA code being transmitted essentially within a frequency channel (f), b) means for adjustment (STE) of the frequency channels (f) to be used according to a first coarse raster scheme and a second fine raster scheme, the frequency spacings (de, di) between the frequency channels (f) being selected individually in such a way that interference between the radio signals of the frequency channels (f) is reduced become.
15. Funkstation (MS/BS) mit15. Radio station (MS / BS) with
Mitteln zur Übertragung von Informationen, wobei die Übertragung mittels Funksignale erfolgt, die im wesentlichen innerhalb von Frequenzkanalen liegen, die aus einer bestimmten vorgegebenen Menge von Frequenzkanalen entnehmbar sind, wobei diese Menge durch die entsprechenden Tragermittenfrequenzen gemäß folgender Beziehung beschreibbar ist: m = f0 + n * fs -r k * 200kHz, mitMeans for the transmission of information, the transmission being carried out by means of radio signals which lie essentially within frequency channels which can be extracted from a specific predetermined quantity of frequency channels, this quantity being describable by the corresponding carrier center frequencies in accordance with the following relationship: m = f0 + n * fs -rk * 200kHz, with
- kmax < k < + kmax, 0 < n < nmax, m Tragermittenfrequenz, fs Tragerabstand, fO kleinste Tragermittenfrequenz.- kmax <k <+ kmax, 0 <n <nmax, m carrier center frequency, fs carrier spacing, fO lowest carrier center frequency.
16. Funkstation (MS/BS) mit einer Steuereinrichtung (STE) zur Steuerung einer Frequenzkanalsuche derart, daß zur Frequenzkanalsuche nur oder priorisiert Frequenzkanale aus einer bestimmten vorgegebenen Menge von Frequenzkanalen herangezogen werden, wobei diese Menge durch die entsprechenden Tragermittenfrequenzen gemäß folgender Beziehung beschreibbar ist: m = f0 + n * fs + k * 200kHz, mit16. Radio station (MS / BS) with a control device (STE) for controlling a frequency channel search in such a way that frequency channels from a certain predetermined quantity of frequency channels are used only or in a prioritized manner for frequency channel search, this quantity being describable by the corresponding carrier center frequencies in accordance with the following relationship: m = f0 + n * fs + k * 200kHz, with
- kmax < k < + kmax, 0 < n < nmax, m Tragermittenfrequenz, fs Tragerabstand, fO kleinste Tragermittenfrequenz.- kmax <k <+ kmax, 0 <n <nmax, m carrier center frequency, fs carrier spacing, fO lowest carrier center frequency.
17. Funkstation (MS/BS) mit einer Steuereinrichtung (STE) zur Steuerung einer Frequenzkanalsuche derart, daß zur Frequenzkanalsuche nur oder priorisiert Frequenzkanale aus einer bestimmten vorgegebenen Menge von Frequenzkanalen herangezogen werden, wobei diese Menge durch die entsprechenden Tragermittenfrequenzen gemäß folgender Beziehung beschreibbar ist: m = f0 + n * fs + k * 200kHz; mit fO kleinste Mittenfrequenz , n = UARFCN div Nc r, k = (UARFCN mod Nc) - (Nc div 2),17. Radio station (MS / BS) with a control device (STE) for controlling a frequency channel search in such a way that frequency channels from a certain predetermined quantity of frequency channels are used only or in a prioritized manner for frequency channel search, this quantity being describable by the corresponding carrier center frequencies in accordance with the following relationship: m = f0 + n * fs + k * 200kHz; with fO lowest center frequency, n = UARFCN div Nc r, k = (UARFCN mod Nc) - (Nc div 2),
Nc = Anzahl möglicher Trägerpositionen um einen Träger im groben Rasterschema,Nc = number of possible carrier positions around a carrier in the rough grid scheme,
UARFCN = Nummer des genutzten Frequenzkanals. UARFCN = number of the frequency channel used.
EP99945919A 1998-07-14 1999-07-05 Method for transmitting information and radio station Expired - Lifetime EP1097529B1 (en)

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DE19831569A DE19831569A1 (en) 1998-07-14 1998-07-14 Information transmission method for GSM system
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Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1300951C (en) 2000-04-07 2007-02-14 交互数字技术公司 Base station synchronization for wireless communication systems
US6826244B2 (en) 2001-02-27 2004-11-30 Interdigital Technology Corporation Initial cell search algorithm for 3G FDD wireless communication systems
US7813311B2 (en) 2002-02-05 2010-10-12 Interdigital Technology Corporation Method and apparatus for synchronizing base stations
JP3973921B2 (en) * 2002-02-14 2007-09-12 三菱電機株式会社 Frequency selection method and receiver
US20050007979A1 (en) * 2003-07-07 2005-01-13 Intel Corporation Uniform channel spreading in a wireless local area network using dynamic frequency selection
US7215713B2 (en) * 2003-11-26 2007-05-08 Delphi Technologies, Inc. Method to minimize compatibility error in hierarchical modulation
JP4440831B2 (en) * 2005-06-14 2010-03-24 株式会社エヌ・ティ・ティ・ドコモ Base station apparatus, transmission method, and communication system
DE102005027707A1 (en) * 2005-06-15 2006-12-28 Siemens Ag Signal transmitting method for use in radio communication system, involves using two frequency bands to transmit signals from and/or to subscriber terminals, where bands have number of sub-frequency bands with different frequency widths
CN101273589A (en) * 2005-09-29 2008-09-24 Nxp股份有限公司 Frequency scanning method, memory and terminal to implement the method
EP2036220B1 (en) 2006-06-21 2014-10-15 LG Electronics Inc. Cumulative neighboring cell list
US8520645B2 (en) * 2006-06-30 2013-08-27 Core Wireless Licensing S.A.R.L. Method of controlling a mobile terminal, and an associated mobile terminal
US8588147B2 (en) * 2007-11-21 2013-11-19 Samsung Electronics Co., Ltd. Method and system for subcarrier division duplexing
EP2262333B1 (en) * 2008-03-28 2018-05-16 NTT DoCoMo, Inc. Mobile station, base station, basic frequency block specifying method, and band control method
WO2011111207A1 (en) 2010-03-11 2011-09-15 富士通株式会社 Mobile communication system, cell selecting method, base station apparatus and mobile station apparatus
US20130143502A1 (en) * 2010-08-13 2013-06-06 Telefonaktiebolaget Lm Ericsson (Publ) Dual Operation of User Equipment in Licensed and Unlicensed Spectrum

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1273065A (en) * 1987-06-17 1990-08-21 Makoto Yoshimoto Dual polarization transmission system
JPH03243028A (en) * 1990-02-21 1991-10-30 Toshiba Corp Method and device for setting up radio channel to cordless terminal
US5295138A (en) * 1992-04-21 1994-03-15 Northwest Starscon Limited Partnership Apparatus and method for optimal frequency planning in frequency division multiplexing transmissions
AU670955B2 (en) * 1992-08-04 1996-08-08 Koninklijke Philips Electronics N.V. Mobile radio system
JP2576769B2 (en) * 1993-09-24 1997-01-29 日本電気株式会社 Regional wireless communication system
US5805633A (en) * 1995-09-06 1998-09-08 Telefonaktiebolaget L M Ericsson Method and apparatus for frequency planning in a multi-system cellular communication network
US5822686A (en) * 1995-12-11 1998-10-13 Telefonaktiebolaget Lm Ericsson Channel scanning scheme for signal strength measurement systems and methods
JP2845815B2 (en) * 1996-06-20 1999-01-13 日本電気通信システム株式会社 Mobile phone service area detection device
US6131012A (en) * 1998-05-26 2000-10-10 Nera Wireless Broadband Access As Method and system for a micro-channel bank for providing voice, data, and multimedia services in a wireless local loop system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0004661A2 *

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